用于铯频率标准的飞轮振荡器的低温双模谐振器。
Cryogenic dual-mode resonator for a fly-wheel oscillator for a caesium frequency standard.
作者信息
Tobar Michael E, Hartnett John G, Ivanov Eugene N, Cros Dominique, Bilski Pawel
机构信息
University of Western Australia, Crawley, Australia.
出版信息
IEEE Trans Ultrason Ferroelectr Freq Control. 2002 Oct;49(10):1349-55. doi: 10.1109/tuffc.2002.1041076.
A dual-mode, sapphire-loaded cavity (SLC) resonator has been designed and optimized with the aid of finite element software. The resonance frequency was designed to be near the frequency of a Cs atomic frequency standard. Experimental tests are shown to agree very well with calculations. The difference frequency of two differently polarized modes is shown to be a highly sensitive temperature sensor in the 50 to 80 K temperature range. We show that an oscillator based on this resonator has the potential to operate with fractional frequency instability below 10(-14) for measurement times of 1 to 100 seconds. This is sufficient to operate an atomic clock at the quantum projection noise limit.
一种双模、蓝宝石加载腔（SLC）谐振器借助有限元软件进行了设计和优化。谐振频率被设计为接近铯原子频率标准的频率。实验测试结果与计算结果非常吻合。结果表明，两种不同偏振模式的差频在50至80K温度范围内是一种高灵敏度温度传感器。我们表明，基于这种谐振器的振荡器在1至100秒的测量时间内，具有分数频率不稳定度低于10^(-14)的运行潜力。这足以使原子钟在量子投影噪声极限下运行。
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